[Mainline] android.system package APIs migration

By removing Int32Ref.

Bug: 179703584
Bug: 177619520
Test: mma
Change-Id: I9b63146ae563ed977f3112c9910f7a7c575de0b8
Merged-In: I9b63146ae563ed977f3112c9910f7a7c575de0b8
(cherry picked from commit 1a2d570c3a7122940097aa7e983a7240d163c41a)
2 files changed